Page 197 - Analysis, Synthesis and Design of Chemical Processes, Third Edition

7.3.3 Bare Module Cost for Equipment at Base Conditions

The bare module equipment cost represents the sum of direct and indirect costs shown in Table 7.6. The
conditions specified for the base case are
1. Unit fabricated from most common material, usually carbon steel (CS)
2. Unit operated at near-ambient pressure

Equation 7.6 is used to obtain the bare module cost for the base conditions. For these base conditions, a
superscript zero (0) is added to the bare module cost factor and the bare module equipment cost. Thus
and refer to the base conditions.

Table 7.8 supplements Table 7.6 and provides the relationships and equations for the direct, indirect,
contingency, and fee costs based on the purchased cost of the equipment. These equations are used to
evaluate the bare module factor. The entries in Table 7.8 are described on page 202.

Talbe 7.8 Equations for Evaluating Direct, Indirect, Contingency, and Fee Costs

Column 1: Lists the factors given in Table 7.6.

Column 2: Lists equations used to evaluate each of the costs. These equations introduce
multiplication cost factors, α . Each cost item, other than the purchased equipment cost,
i
introduces a separate factor.

Column 3: For each factor, the cost is related to the purchased cost by an equation of the form.

(7.7)